Electric-elevator controller.



No. 664,907. Patented Ian. I, I901. B. s. STEPHENS.

ELECTRIC ELEVATOR CONTROLLER.

(Application flied Mar. 17, 1899. Renewed May 24, 1900.)

(No Model.)

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UNiTED STATES PATENT OFFICE.

HARRINGTON S. STEPHENS, OF NEi/V YORK, N. Y., ASSIGNOR TO THE ELEO- TRIOAL APPLIANCE COMPANY, OF JERSEY CITY, NEW JERSEY.

ELECTRIC-ELEVATOR CONTROLLER.

SPECIFICATION forming part of Letters Patent N 0. 664,907, dated January 1, 1901.

Application filed March 17,1899. Renewed May 24, 1900. Serial No. 17,885. (No model.)

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Be it known that I, BARRINGTON S. STE- PHENs,a citizen of England, and a resident of the city of New York, borough of Brook- 5 lyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Electric-Elevator Controllers, of which the following is a specification.

This invention relates to improvements in i devices for controlling electricallydriven elevators from the car, and especially to that class of such electrically-driven elevators in which the cable-drum is driven by belting from an electric motor.

The object of my invention is to provide a new and improved controller which is simple in construction, effective and reliable in use, and by means of which the motor can be started gradually some time before the car is started, thus avoiding undue tension in the motor, undue sudden jarring of parts, and securing certainty of action.

In the accompanying drawings, forming a part of this specification, and in which like letters of reference indicate like parts in all the views, Figure 1 is a side view of my improved electric-elevator controller, parts be ing broken away and the cable-drum and belt shifter being shown. Fig. 2 is a side view of part of the controller. Fig. 3 is a detail face view of parts.

On a marble or slate slab A the two fixed members a a of an electric switch are secured and are adapted to receive the movable switch members I) Z), fixed on rod B, guided to move longitudinally on the slab A. One switch member or contact a is connected by the wire a with a motor, (not shown,) and the other member is connected by a wire a with the pivot C of a lever (J, one end of which bears upward against a pin B on the switch-rod B, and the other end of which lever carries a contact D, adapted to sweep over a series of contacts D, arranged in the arc of a circle on the slab A, said contacts being connected by resistances D of any well-known construction. A weight E is attached to that end of the lever 0 provided with the contact D, and a dasl1-pot E is connected with the lever O to prevent the too-rapid descent of the same. The wire I) also extends to the electric motor-and the wires 5 and b to the main lines. A pin F extends from the upper end of the switch-rod B into a longitudinal slot G in a bar G, the upper end ofwhich is pivoted to the side of a pulley I, over which the main hand-rope H of the elevator passes. A supplemental elevator hand-rope J, passing over a guide-pulley J, has its lower end secured to the upper end of a helical spring K, the lower end of which spring is attached to the upper end of the switch-rod B. A latch-lever L is pivoted to the bar G at the slot G in such a manner that its shorter end can extend into the slot G a certain distance, as shown in Fig. 3. A stop-pin m on the bar G prevents swinging the lever L down too far, and another stop-pin m prevents swinging it up too far. A cord M connects the longer end of the lever L with the lower end of the supplemental hand-rope J. The belt-shifters N and O for the belts N and O are carried by a suitably-guided bar P, which is connected by a connecting-rod Q with the pulley I.

T represents the cable-drum.

The operation is as follows: WVhen the elevator is at a standstill, the belts N and O are on the two loose pulleys R and S at the 1 sides of the pulley V, fixed on the cable-drum shaft T, and the electric switch is open. To start the elevator up or down, the supplemental hand-rope J is pulled upward,whereby the helical spring K is extended and brought into greater tension and the outer end of the latch-lever L pulled upward and said latchlever brought into the position shown in dotted lines in the lower part of Fig. 3, so that its inner end leaves the pin F on the switchrod B, permitting the extended spring K to pull the switch-rod B up suddenly and to close the electric switch. As thereby the strain on the cord M is removed the latch -lever L swings down until it again rests against the pin m, and the several parts are in the position shown in dotted lines in the upper part of Fig. 3. As the switch-rod B moves upward it releases the lever O, and the latter swings downward under the action of its weight E and controlled by the dash-pot E, causing the contact D to sweep over the com tacts D, whereby the resistances D are successively cut out and the current gradually all admitted into the m otor, which is thus started, and by means of belting, pulleys, and a suitable counter-shaft (not shown) drives the belts N 0. If the car is to ascend or descend, the hand-rope H is pulled to turn the pulley I to the right or left, whereby either the belt N or the belt 0, one of which is crossed, is shifted upon the tight pulley V, and the cable-drum T is thus rotated to move the car up or down. As the pin F is now at the top of the slot G, into which position it was brought by the action of the spring K, the bar G can move up as the pulley I is turned to the right or left without acting on the pin F, the latch-lever L being held horizontally over said pin, as shown in dotted lines in the upper part of Fig. 3. lVhenthe car is to be stopped, the hand-rope His pulled, so as to turn the pulley I to the right or left su'fficiently to bring the bar G to its lowest position, as shown in Fig. 1. As the bar G is forced down the latch-lever L, which bears against the pin m and which prevents the inner end of the latch-lever from swinging upward, presses on the pin F and presses the same and the switch-rod B downward, whereby the switch is opened, the spring K pulled down, as is also the supplemental hand-rope J, and the pin B on the switch-rod forces down the lever C, raising its weighted end, and thus the motor is stopped and can again be started in the manner described by pulling the supplemental hand-rope J, and so on.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an electric-elevator controller, the combination with an electric switch, of two independent hand-ropes, one for closing and one for opening said switch, substantially as herein shown and described.

2. In an electric-elevator controller, the combination with an electric switch, of two independent hand-ropes, one for closing and one for opening said switch and means for shifting motor-belts by means of the switchopening hand-rope, substantially as herein shown and described.

3. In an electric-elevator controller, the combination with an electric switch and motor belt-shifter, of a hand-rope for actuating the belt-shifter and also acting on the electric switch and a separate hand-rope for acting on the same electric switch, substantially as herein shown and described.

4. In an electric-elevator controller, the combination with an electric switch, of a hand-rope for actuating the same, a latch-lever on parts of the switch and a separate hand-rope for actuating said latch-lever, substantially as herein shown and described.

5. In an electric-elevator controller, the combination with an electric switch, of a bar foractuating said switch, a hand-rope for shifting said bar, a latch-lever on said bar and a separate hand-rope for actuating said latch-lever, substantially as herein shown and described.

6. In an electric-elevator controller, the combination with an electric switch, of a bar for actuating the same, a hand-rope for shifting said bar, a latch-lever on said bar for temporarily locking the switch-rod, a separate hand-rope for actuating said latclrlever and a spring attached to the switch-rod and to the separate hand-rope, substantially as herein shown and described.

7. In an electric-elevator controller, the combination with an electric switch, of a bar for actuating the same, which bar has a longitudinal slot, 21 pin extending from the switch-rod into said slot, a latch-lever pivoted to said bar to extend into the said slot, a separate hand-rope attached to said latch-lever and a spring attached to the separate handrope and to the switch-rod, substantially as herein shown and described.

8. In an electric-elevator controller, the combination with an electric switch, of a bar for actuating the same, which bar has a longitudinal slot, a pin extending from the switch-rod into said slot, a latch-lever pivoted to said bar to extend into the said slot, a separate hand-rope attached to said latch-lever, and a spring attached to the separate handrope and to the switch-rod, and stop-pins for said latch-lever, on the bar, substantially as herein shown and described.

Signed at New York, in the county of New York and State of New York, this 27th day of February, A. D. 1899.

BARRIN GTON S. STEPHENS.

Witnesses:

H. M. FLANNERY, M. H. SMILLIE.

IOC 

